Never used the sysprep . I'm no fan of the Advanced LRT tubing at least in the 5/8 OD 3/8 ID size however. Had to dip the tubing in boiling water for over 5 min to even think about getting that stuff over the barbs on my Swiftech Lok-Seal compression fittings. Getting the compression collar screwed down; HA that was 100% impossible to even get the collar's own threads to start connecting with the threads on the barb using my hands, LET ALONE actually getting the collar screwed down. Maybe I too got a bad batch but I'm not impressed with the advanced LRT tubing